Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China
Understanding the processes that influence the structure of biotic communities is one of the major ecological topics, and both stochastic and deterministic processes are expected to be at work simultaneously in most communities. Here, we investigated the vertical distribution patterns of bacterial c...
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ftosti:oai:osti.gov:1627779 2023-07-30T04:06:15+02:00 Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan Zhu, Liping 2021-03-26 application/pdf http://www.osti.gov/servlets/purl/1627779 https://www.osti.gov/biblio/1627779 https://doi.org/10.1371/journal.pone.0145747 unknown http://www.osti.gov/servlets/purl/1627779 https://www.osti.gov/biblio/1627779 https://doi.org/10.1371/journal.pone.0145747 doi:10.1371/journal.pone.0145747 2021 ftosti https://doi.org/10.1371/journal.pone.0145747 2023-07-11T09:42:43Z Understanding the processes that influence the structure of biotic communities is one of the major ecological topics, and both stochastic and deterministic processes are expected to be at work simultaneously in most communities. Here, we investigated the vertical distribution patterns of bacterial communities in a 10-m-long soil core taken within permafrost of the Qinghai-Tibet Plateau. To get a better understanding of the forces that govern these patterns, we examined the diversity and structure of bacterial communities, and the change in community composition along the vertical distance (spatial turnover) from both taxonomic and phylogenetic perspectives. Measures of taxonomic and phylogenetic beta diversity revealed that bacterial community composition changed continuously along the soil core, and showed a vertical distance-decay relationship. Multiple stepwise regression analysis suggested that bacterial alpha diversity and phylogenetic structure were strongly correlated with soil conductivity and pH but weakly correlated with depth. There was evidence that deterministic and stochastic processes collectively drived bacterial vertically-structured pattern. Bacterial communities in five soil horizons (two originated from the active layer and three from permafrost) of the permafrost core were phylogenetically random, indicator of stochastic processes. However, we found a stronger effect of deterministic processes related to soil pH, conductivity, and organic carbon content that were structuring the bacterial communities. We therefore conclude that the vertical distribution of bacterial communities was governed primarily by deterministic ecological selection, although stochastic processes were also at work. Furthermore, the strong impact of environmental conditions (for example, soil physicochemical parameters and seasonal freeze-thaw cycles) on these communities underlines the sensitivity of permafrost microorganisms to climate change and potentially subsequent permafrost thaw. Other/Unknown Material permafrost SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) PLOS ONE 10 12 e0145747 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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Understanding the processes that influence the structure of biotic communities is one of the major ecological topics, and both stochastic and deterministic processes are expected to be at work simultaneously in most communities. Here, we investigated the vertical distribution patterns of bacterial communities in a 10-m-long soil core taken within permafrost of the Qinghai-Tibet Plateau. To get a better understanding of the forces that govern these patterns, we examined the diversity and structure of bacterial communities, and the change in community composition along the vertical distance (spatial turnover) from both taxonomic and phylogenetic perspectives. Measures of taxonomic and phylogenetic beta diversity revealed that bacterial community composition changed continuously along the soil core, and showed a vertical distance-decay relationship. Multiple stepwise regression analysis suggested that bacterial alpha diversity and phylogenetic structure were strongly correlated with soil conductivity and pH but weakly correlated with depth. There was evidence that deterministic and stochastic processes collectively drived bacterial vertically-structured pattern. Bacterial communities in five soil horizons (two originated from the active layer and three from permafrost) of the permafrost core were phylogenetically random, indicator of stochastic processes. However, we found a stronger effect of deterministic processes related to soil pH, conductivity, and organic carbon content that were structuring the bacterial communities. We therefore conclude that the vertical distribution of bacterial communities was governed primarily by deterministic ecological selection, although stochastic processes were also at work. Furthermore, the strong impact of environmental conditions (for example, soil physicochemical parameters and seasonal freeze-thaw cycles) on these communities underlines the sensitivity of permafrost microorganisms to climate change and potentially subsequent permafrost thaw. |
author |
Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan Zhu, Liping |
spellingShingle |
Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan Zhu, Liping Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
author_facet |
Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan Zhu, Liping |
author_sort |
Hu, Weigang |
title |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_short |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_full |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_fullStr |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_full_unstemmed |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_sort |
relative roles of deterministic and stochastic processes in driving the vertical distribution of bacterial communities in a permafrost core from the qinghai-tibet plateau, china |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1627779 https://www.osti.gov/biblio/1627779 https://doi.org/10.1371/journal.pone.0145747 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
http://www.osti.gov/servlets/purl/1627779 https://www.osti.gov/biblio/1627779 https://doi.org/10.1371/journal.pone.0145747 doi:10.1371/journal.pone.0145747 |
op_doi |
https://doi.org/10.1371/journal.pone.0145747 |
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PLOS ONE |
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10 |
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12 |
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e0145747 |
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1772818744085577728 |